There were promising medical results this week from an unexpected source – ketamine. The drug has been used in preliminary trials to treat patients with mental health issues and although the researchers say it's a long way off being a routine treatment, the results are encouraging.

We spoke to Ukrainian artist Nastya Nudnik this week about her project Emoji Nation, that takes classic paintings from through the ages and adds emoji, to communicate the feelings of the subjects to a modern audience. It's great.

The LA producer Paz made 5,000 of what looked like Justin Bieber's latest record but were in fact, just his own music. He then went into high street shops and swapped every Bieber CD in LA for his impostors.